US Bridges

Dehlinger Road over Lost River

Fair

Klamath County, Oregon · 6.47 MI FR 39 near Hill · Structure no. 18C24AB32000647

Built
1975
50 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
92 ft
1 main span
Daily traffic
339
2020 count
Owner
County
County Highway Agency

About this bridge

Dehlinger Road over Lost River is a wood or timber stringer/multi-beam or girder carrying Dehlinger Road over Lost River in Klamath County, Oregon. It was built in 1975, so it is 50 years old, older than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 339 vehicles a day, roughly 25% of them trucks, projected to reach 389 by 2025. The structure is 92 ft (28 m) long and 32 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesDehlinger Road
CrossesLost River
Location6.47 MI FR 39 near Hill
RouteCounty Highway 0B320
StateOregon
Coordinates42.11163, -121.69178
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating25 US tons
Inventory rating19.3 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadH 20
Structure length92 ft (28 m)
Longest span81 ft (24.7 m)
Deck width32 ft (9.8 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic339 (2020)
Projected traffic389 by 2025
Trucks25%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Dehlinger Road over Lost River built?

It was built in 1975, making it 50 years old in 2025.

What condition is Dehlinger Road over Lost River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in March 2023.

How much traffic does Dehlinger Road over Lost River carry?

About 339 vehicles per day (2020 count), of which roughly 25% are trucks.

How long is Dehlinger Road over Lost River?

The structure is 92 ft (28 m) long with a longest span of 81 ft (24.7 m) and a deck 32 ft wide.

Who owns Dehlinger Road over Lost River?

It is owned by the County Highway Agency.